Calculate dosage based on weight and concentration (mg/kg)
kg
lb
Consult your vet for exact dosage.
Pill / Tablet
Liquid Suspension
Strength of the tablet.
Calculated Results
Total Milligrams (mg):0 mg
Amount to Give:0
Note: Always round to the nearest safe dose as instructed by your veterinarian.
Understanding Metronidazole for Dogs
Metronidazole (commonly known by the brand name Flagyl) is a versatile antibiotic and antiprotozoal medication used in veterinary medicine. It is primarily prescribed to treat diarrhea caused by anaerobic bacteria and protozoal infections such as Giardia.
Common Dosage Guidelines
While only a veterinarian can prescribe the correct dose, standard veterinary dosages typically fall into these ranges:
Giardia: 15 mg/kg to 25 mg/kg once or twice daily.
Anaerobic Infections: 10 mg/kg to 15 mg/kg twice daily.
Inflammatory Bowel Disease: 10 mg/kg to 15 mg/kg twice daily.
Example Calculation
If your dog weighs 22 lbs (10 kg) and your vet prescribes 15 mg/kg:
Convert lbs to kg: 22 / 2.204 = 10 kg.
Multiply kg by dosage: 10 kg × 15 mg/kg = 150 mg.
If you have 250 mg tablets, your dog might require approximately 0.5 to 0.6 of a tablet.
Important Safety Information
Metronidazole must be used with caution. Overdose can lead to neurotoxicity, characterized by staggering, rapid eye movement (nystagmus), and tremors. Never increase the dose without consulting your vet. If your dog misses a dose, do not double the next dose.
Disclaimer: This calculator is for educational purposes only. Always follow the specific instructions provided on your veterinarian's prescription label.
function updateConcentrationLabel() {
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var label = document.getElementById("concentrationLabel");
var sub = document.getElementById("concentrationSub");
if (form === "liquid") {
label.innerText = "Mg per mL";
sub.innerText = "Check the bottle (e.g., 50mg/mL)";
} else {
label.innerText = "Mg per Pill";
sub.innerText = "Strength of the tablet (e.g., 250mg)";
}
}
function calculateDose() {
var weight = parseFloat(document.getElementById("dogWeight").value);
var weightUnit = document.getElementById("weightUnit").value;
var mgPerKg = parseFloat(document.getElementById("mgPerKg").value);
var medForm = document.getElementById("medForm").value;
var concentration = parseFloat(document.getElementById("concentration").value);
var resMg = document.getElementById("resMg");
var resAmount = document.getElementById("resAmount");
var resAmountLabel = document.getElementById("resAmountLabel");
var resultArea = document.getElementById("resultArea");
if (isNaN(weight) || isNaN(mgPerKg) || weight <= 0 || mgPerKg 0) {
var doseAmount = totalMg / concentration;
if (medForm === "liquid") {
resAmount.innerText = doseAmount.toFixed(2) + " mL";
resAmountLabel.innerText = "Liquid Amount (mL):";
} else {
resAmount.innerText = doseAmount.toFixed(2) + " Tablets";
resAmountLabel.innerText = "Number of Pills:";
}
} else {
resAmount.innerText = "N/A (Set Concentration)";
resAmountLabel.innerText = "Amount to Give:";
}
resultArea.style.display = "block";
resultArea.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}